FAN8423D3 Fairchild Semiconductor, FAN8423D3 Datasheet
FAN8423D3
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FAN8423D3 Summary of contents
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... Digital video disk Player (DVDP) spindle motor • Other compact disk media spindle motor • Other 3-phase BLDC motor ©2000 Fairchild Semiconductor International www.fairchildsemi.com Description The FAN8423D3 is a monolithic IC, suitable for a 3-phase spindle motor driver of a CD-media system. 28-SSOPH-375SG2 Ordering Information Device Package ...
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... H3 PC1 FG3X 20 DIR 21 ECR S/S 24 FG1X 25 VCC CS1 2 FIN(GND FAN8423D3 FIN(GND) I/O Pin Function Description - No connection O Output (A3 connection O Output (A2 connection - No connection O Output (A1) - Ground I Hall signal (H1+) I Hall signal (H1-) I Hall signal (H2+) I Hall signal (H2-) I Hall signal (H3+) I Hall signal (H3-) ...
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... Internal Block Diagram GND Absolute Values Current Sense Output Amp Current Limit GND Rev. 1.0.1 Oct. 2000. FAN8423D3 TSD Hall Amp ...
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... FAN8423D3 Equivalent Circuits Hall Input Torque Control Input Start/stop Input 50 40K 23 30K Fg Output Vcc 10K Short Brake Input 50 18 30K 19 24 Rev. 1.0.1 Oct. 2000. Driver Output Hall Bias Input 100K 1K 20K Dir Output Vcc 50 20 ...
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... Supply Voltage Motor Supply Voltage Symbol V CCmax V Mmax Omax T OPR T STG 1.57mm PCB (Phenolic resin material 100 125 150 175 Symbol Min 3.5 M Rev. 1.0.1 Oct. 2000. FAN8423D3 Value Unit note 2.5 W 1.3 A -25 ~ +75 C -55 ~ +150 C Ambient temperature Typ. Max. Unit 5 5 ...
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... FAN8423D3 Electrical Characteristics (Unless otherwise specified Vcc Parameter Quiescent circuit current 1 Quiescent circuit current 2 START/STOP On voltage range Off voltage range HALL BIAS Hall bias voltage HALL AMP Hall bias current Common-mode input range Minimum input level H1 hysteresis level TORQUE CONTROL Ecr Input voltage range ...
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... GM times R1 fixed value within IC. Vmax (see above block diagram) is set at350mV. VM Negative Feedback loop Vin Driver + + Vmax VM Max. output current limiting 0.255 -------------- - A V Gain = R S Vmax 350 mV Itl mA = --------------- - = ----------------------- - Rev. 1.0.1 Oct. 2000. FAN8423D3 Output Current sense + CS1 (Pin 28 Power V Transistors W Commutation Distributor ...
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... FAN8423D3 Application Information 1. Torque Control & Output Current Control Torque AMP Ecr + - amplifying the voltage difference between Ec and Ecr from Servo IC, the Torque Sense AMP produces the input (V ) for the Current Sense AMP. AMP 2) The output current ( converted into the voltage (V ...
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... However, if the Spindle Motor rotates rapidly, the Brake function of the reverse voltage may produce more heat at the Drive IC. To remove this shortcoming and to enhance the braking efficiency, the Short Brake function is added to FAN8423D3. When the Short Brake function is active, all upper Power TRs turn off and all lower Power TRs turn on. This slows down the motor. ...
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... FAN8423D3 4. Tsd (Thermal Shutdown) When the chip temperature rises up to about 175 C, the Q2 turns on so that the output driver shuts down. When the chip tem- perature falls off to about 150 C, then the Q2 turns off so that the driver is to operate normally. TSD has the temperature hys- teresis of about 25 C ...
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... The operation principle is shown in the table and the flow chart. Rotation H2 Forward H Reverse L Current Sense Amp Low Active A Q Gain Controller D-F Rev. 1.0.1 Oct. 2000. FAN8423D3 (b) Forward rotation Driver M Reverse Rotation Preventer E <E E > Forward - - Brake and Stop 11 ...
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... FAN8423D3 Rotating speed is decreased due to reverse torque at EC >ECR. (Motor still rotates forward) At the moment that the motor rotates in reverse, the reverse rotation preventer makes the output power transistor open. Rotating reverse at short time due to motor inertia 7. Fg Output H1- H1+ H2- ...
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... Connect A By-pass Capacitor, 0.1 f Between The Supply Voltage Source (1) The heat radiation fin is connected to the internal Gnd of the package. Connect that fin to the external Gnd. 25 Vcc 0.1uF Rev. 1.0.1 Oct. 2000. FAN8423D3 13 ...
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... FAN8423D3 10. Input-output Timing Chart output current (H1 -)+( output voltage A2 output current (H2 -)+( output voltage A3 output current (H3 -)+( output voltage 14 Rev. 1.0.1 Oct. 2000. ...
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... VR1 VR3 VR2 15 IM1 A IM2 A VM6 FG1X SS EC ECR FAN8423D3 A1 GND SW3 VR8 b RL=5 RL=5 V VM2 Rev. 1.0.1 Oct. 2000. FAN8423D3 20mA V V VM3 VM5 13 VR5 10uA 15 V VM4 VM6 0.1uF DIR FG3X SB PS1 NC VH H1+ H1- H2+ H2- H3+ H3 IM4 IM5 ...
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... FAN8423D3 Typical Application circuits HALL 1 HALL 2 HALL CS1 VCC A2 FG1X FAN8423D3 8 21 ECR GND 9 20 DIR H1+ FG3X H2+ PC1 H3 Rev. 1.0.1 Oct. 2000. V (12V (5V 2.1V Servo Signal R2 0.1 F ...
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... Rev. 1.0.1 Oct. 2000. FAN8423D3 17 ...
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... FAN8423D3 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ...